参数资料
型号: XE8801AMI000WP
厂商: Semtech
文件页数: 20/135页
文件大小: 0K
描述: SENSING MACHINE WITH 16 + 10 BIT
标准包装: 558
系列: XE880x
应用: 感测机
核心处理器: Coolrisc816?
程序存储器类型: 闪存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
输入/输出数: 24
电源电压: 2.4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 模具
包装: 托盘
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名称: Q2722595
Semtech 2005
www.semtech.com
16-31
XE8801A – SX8801R
0
0.2
0.4
0.6
0.8
1
1.2
01
2
3
4
Normalized Frequency - f *(OSR/fS) [-]
N
o
rm
a
li
z
e
d
M
a
g
n
it
u
d
e
[-]
NELCONV = 1
0
0.2
0.4
0.6
0.8
1
1.2
01
2
3
4
Normalized Frequency - f *(OSR/fS) [-]
N
o
rm
a
li
z
e
d
M
a
g
n
itu
d
e
[-]
NELCONV = 2
0
0.2
0.4
0.6
0.8
1
1.2
01
23
4
Normalized Frequency - f *(OSR/fS) [-]
No
rm
a
li
z
e
d
M
a
g
n
itu
d
e
[-]
NELCONV = 4
0
0.2
0.4
0.6
0.8
1
1.2
01234
Normalized Frequency - f *(OSR/fS) [-]
N
o
rm
a
li
z
e
d
M
a
g
n
itu
d
e
[-]
NELCONV = 8
Figure 16-26 Frequency response: normalized magnitude vs. frequency for different NELCONV
16.9.5
Power Reduction
The ZoominADC
is particularly well suited for low-power applications. When very low power consumption is of
primary concern, such as in battery operated systems, several parameters can be used to reduce power
consumption as follows:
1)
Operate the acquisition chain with a reduced supply voltage VDD.
2)
Disable the PGAs which are not used during analog-to-digital conversion with ENABLE[3:0].
3)
Disable all PGAs and the ADC when the system is idle and no conversion is performed.
4)
Use lower bias currents in the PGAs and the ADC using the control words IB_AMP_PGA[1:0] and
IB_AMP_ADC[1:0]
. (This reduces the maximum sampling frequency according to Table 16-26.)
5)
Reduce internal RC oscillator frequency and/or sampling frequency.
Finally, remember that power reduction is typically traded off with reduced linearity, larger noise and slower
maximum sampling speed.
Not
Recommended
for
New
Designs
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